Pra(redirected from Purchase and Resale Agreement)
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The language used by COPS for specification of code generators.
["Metalanguages of the Compiler Production System COPS", J. Borowiec, in GI Fachgesprach "Compiler-Compiler", ed W. Henhapl, Tech Hochs Darmstadt 1978, pp. 122-159].
a river in Riazan’ Oblast, RSFSR, a left tributary of the Oka. It is 167 km long and drains an area of 5,520 sq km. The Pra is fed primarily by snow. It has a mean flow rate of 25 cu m per sec and a maximum flow rate of approximately 600 cu m per sec. The river freezes at the end of November, and the ice breaks up in April. Timber is floated on the Pra. The Oka Preserve is located in the lower reaches.